help you. coffee drinkers have lower risk of diabetes, for example. two liters of water a day was also considered a must, but that, too, turns out to be a myth. >> o course you should drink when you're thirsty, but you do not have to drink all day long. >> and what about the enemy of every diet -- fat? for years, people were told they should cut the fat if they wanted to cut their weight, but that is necessary for a healthy metabolism, and, of course, it tastes good, too. than in many think they should not enjoy the food that they eat if they really want to eat healthy, but that is not true. it is possible to eat healthy food and enjoy it. >> these people are clearly impressed. we are constantly bombarded by suggestions for healthier eating. at the same time, we want to try new things, be it begin food, regional specialities, or protein-rich while plants. if what we eat tastes good, so much the better. >> a quick update now from the world of tennis and the men's semifinal at the australian open in melbourne. >> north dakota mary beat roger feder in a high-quality victory in five sets.